I would buy some Dockers for him and hide them in your suitcase. If he gets turned away, whip out the Dockers and save the evening. No need to stress out and start an argument before its necessary.
Have a wonderful cruise!
Renee - The better half of RobRen :-)
Carnival - Spirit: Alaska (August 8, 2007)
Carnival - Miracle: Exotic Western Caribbean (April 9, 2006)
Royal Caribbean - Explorer of the Seas: Eastern Caribbean (January 2005)